If you are looking for a freeware that will convert OST to PST file format quickly and easily, OST2 is what you need. After a couple of clicks, you will be able to open the converted PST file in Outlook.
Our OST converter is useful if, for some reason, Microsoft Exchange Server data needs to be moved and opened in Microsoft Outlook. This free converter is able to do it simply and easily. Convert files in a couple of clicks - select an OST file and choose the location where you want to save the PST file. OST2 will automatically connect the converted files to Outlook*, so you won’t need to import .pst files manually.Convert orphaned OST files to PST format using OST2 Enterprise Edition. It means that you can convert OST files that are not connected to Outlook.
OST to PST conversion can be a solution of problems caused by Exchange Server. In case of your Exchange Server downtime, accidental user account deletion, the server crashes and your data is not accessible, you may want to convert OST to PST file format. All your emails, calendars, contacts, tasks etc. can be opened in Outlook after the OST2PST conversion. To prevent Offline Storage .ost file’s data loss, it is useful to back up data in the Personal Storage file format. Back up Exchange data using this simple OST to PST converter.*Get more with OST2 Enterprise Edition:

Convert OST files that are not connected to Microsoft Outlook (orphaned OST files)

Main features of OST2:

Convert OST to PST (Exchange Offline Storage files to Personal Storage) files. Use OST2 as ost to pst converter to transfer data from Exchange to Outlook, make your Exchange account emails, calendar, contacts and other items accessible through Outlook. OST file must be connected to Outlook, in order to convert it. If you want to convert files that are not connected, please check OST2 Enterprise Edition.

Use this OST converter tool to back up data as a .PST file in case something happens to Exchange Server. For fully customizable Microsoft Outlook and Exchange backup, see our Safe PST Backup Enterprise Edition software.

By converting OST files to PST format, the Exchange mailbox can be restored even after accidental Exchange user mailbox deletion. Convert OST file and open Exchange mailbox emails, contacts, calendars and other folders in Outlook easily.

After OST file is converted to the PST file format, it can be automatically connected to your Outlook. So you won’t need to import the PST file to Outlook manually. OST2 is able to import a single file or a batch of files at once.

OST2 Pro/Enterprise Edition allows you to choose advanced conversion settings. With Pro Edition, you can convert multiple OST files; schedule a conversion to run at the specific time interval; make conversion hidden from an end user (“silent mode”). Click here to learn more about OST2 Enterprise Edition or buy ost pst software.